Home / 21,185.65-31,762.23-12,863.36

Finding the Fourth Proportional to 21,185.65, 31,762.23 and 12,863.36

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Solution

The fourth proportional to 21,185.65, 31,762.23 and 12,863.36 is: 19,285.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.65 : 31,762.23 = 12,863.36 : x
  2. Step 2: Convert to fraction form
    21,185.65/31,762.23 = 12,863.36/x
  3. Step 3: Cross multiply
    21,185.65x = 31,762.23 × 12,863.36
  4. Step 4: Simplify right side
    21,185.65x = 408,568,851.40
  5. Step 5: Solve for x
    x = 408,568,851.40/21,185.65
  6. Step 6: Final answer
    x = 19,285.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.